Why is there no amount on 1040-SR, line 4a "IRA Distributions", even though I laboriously entered amounts in Turbo Tax from 1099-R?

Is the right taxable amount on line 4b?  If the same amount is on 4a and 4b it doesn't print the 4a amount.  The IRS doesn't want it filled out.

Volvo girl,

Thank you very much.  I never even noticed the 4b line, but yes, the proper total amount is listed there.  You gave a perfectly clear answer.  Much appreciated!

Found the new link......

See IRS Pub 590b page 22
https://www.irs.gov/pub/irs-pdf/p590b.pdf

Reporting taxable distributions on your return. Report fully taxable distributions, including early distributions, on Form 1040, 1040-SR, or 1040-NR, line 4b (no entry is required on line 4a). If only part of the distribution is taxable, enter the total amount on Form 1040, 1040-SR, or 1040-NR, line 4a, and enter the taxable part on Form 1040, 1040-SR, or 1040-NR, line 4b.